MAL-2025-4273 Malicious code in websign (PyPI)
Malicious package
Published
MAL-2025-4273 is a malicious package: websign (PyPI). Every version was published to cause harm.
Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.
Reference: https://insights.sbomify.com/MAL-2025-4273/ (Markdown: https://insights.sbomify.com/MAL-2025-4273/index.md)
- Package
- websign
- Registry
- PyPI
What is MAL-2025-4273?
MAL-2025-4273 is a malicious package in websign, published on 27 Apr 2025.
Official description
Package contains just a function to send out data. It (or a package sharing the same IoCs) is used in a malicious GitHub project to exfiltrate crypto currency private keys, e.g. https://github.com/taikoyaki/MegaEth-Auto-Bot/blob/772b4591daaa0b200d1bd1fd3be3d48b8433f084/cap/cap.py#L49
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2025-04-alchemyrpcs
Reasons (based on the campaign):
crypto-related
The malicious code is intentionally included in a dependency of the package
exfiltration-crypto
What should I do about MAL-2025-4273?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.